[Chromoting] Pass list of locale files into build-webapp in a single file.

remoting/app_remoting_webapp_build.gypi

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'includes': [
     'remoting_version.gypi',
     'remoting_locales.gypi',
     'remoting_webapp_files.gypi',
     'app_remoting_webapp_files.gypi',
@@ skipping 53 matching lines @@
         '<@(ar_shared_resource_files)',
         '<@(ar_all_js_files)',
         '<@(ar_generated_html_files)',
       ],
       'output_dir': '<(PRODUCT_DIR)/app_streaming/<@(ar_service_environment)/>(_target_name)',
       'zip_path': '<(PRODUCT_DIR)/app_streaming/<@(ar_service_environment)/>(_target_name).zip',
       'remoting_app_id': [],
       'remoting_app_name': '>(_app_name)',
       'remoting_app_description': '>(_app_description)',
 
+      'ar_webapp_locales_listfile': '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)_locales.txt',
+
       'conditions': [
         ['ar_internal != 1', {
           'ar_app_name': 'sample_app',
           'ar_app_path': 'webapp/app_remoting/apps/>(ar_app_name)',
         }, {
           # This takes target names of the form 'ar_vvv_xxx_xxx' and extracts
           # the vendor ('vvv') and the app name ('xxx_xxx').
           'ar_app_vendor': '>!(python -c "import sys; print sys.argv[1].split(\'_\')[1]" >(_target_name))',
           'ar_app_name': '>!(python -c "import sys; print \'_\'.join(sys.argv[1].split(\'_\')[2:])" >(_target_name))',
           'ar_app_path': 'webapp/app_remoting/internal/apps/>(ar_app_vendor)/>(ar_app_name)',
         }],
       ],  # conditions
 
     },  # variables
 
     'actions': [
       {
+        'action_name': 'Build ">(ar_app_name)" locale listfile',
+        'inputs': [
+          '<(remoting_localize_path)',
+        ],
+        'outputs': [
+          '<(ar_webapp_locales_listfile)',
+        ],
+        'action': [
+          'python', '<(remoting_localize_path)',
+          '--locale_output',
+          '"<(webapp_locale_dir)/@{json_suffix}/messages.json"',
+          '--print_to_filelist',
+          '<(ar_webapp_locales_listfile)',
+          '<@(remoting_locales)',
+        ],
+      },
+      {
         'action_name': 'Build ">(ar_app_name)" application stub',
         'inputs': [
           '<(DEPTH)/remoting/webapp/build-webapp.py',
           '<(chrome_version_path)',
           '<(remoting_version_path)',
           '<@(ar_webapp_files)',
           '<@(remoting_webapp_locale_files)',
           '<@(ar_generated_html_files)',
           '<(ar_app_manifest_app)',
           '<(DEPTH)/remoting/<(ar_app_manifest_common)',
+          '<(ar_webapp_locales_listfile)',
         ],
         'outputs': [
           '<(output_dir)',
           '<(zip_path)',
         ],
         'action': [
           'python', '<(DEPTH)/remoting/webapp/build-webapp.py',
           '<(buildtype)',
           '<(version_full)',
           '<(output_dir)',
           '<(zip_path)',
           '<(ar_app_manifest_app)', # Manifest template
           'app_remoting',  # Web app type
           '<@(ar_webapp_files)',
           '<@(ar_generated_html_files)',
-          '--locales',
-          '<@(remoting_webapp_locale_files)',
+          '--locale_file',
+          '<(ar_webapp_locales_listfile)',
           '--jinja_paths',
           '<(DEPTH)/remoting/webapp/app_remoting',
           '<@(remoting_app_id)',
           '--app_name',
           '<(remoting_app_name)',
           '--app_description',
           '<(remoting_app_description)',
           '--app_capabilities',
           '>@(_app_capabilities)',
           '--service_environment',
@@ skipping 51 matching lines @@
         # rather than using the extension id.
         # This is only done for Dev apps because the app-id for Release apps
         # *must* match the extension id.
         'variables': {
           'remoting_app_id': ['--appid', '>(_app_id)'],
         },
       }],
     ],  # conditions
   },  # target_defaults
 }